Mold.



F. B. TORREY.

MOLD.

APPLIGATION FILED SEPT.11. 1913.

Patented Jan. 5, 1915.

FRANCIS .B. TORREY, OF RICHMOND, MAINE.

MOLD.

Application filed September 11, 1913.

T0 alien/tom it may concern Be it known that I, FRANCIS B. TORREY,citizen of the United States, residing at lticlnnond, in the county ofSaga-dahoc and State of Maine, have invented certain new and usefulImprovements in Molds, of which the following is a specification.

This invention relates to molds and more particularly to a mold designedfor use in molding bushings such as shown and described in my co-pendingapplication, filed July 10, 1913, Serial Number 7 78,410.

It is an aim of the present invention to provide a moldso constructed.that the bushing section molded therein may be readily removed from themold, the mold being formed in sections adapted to be assembled in sucha manner that one of the sections may be readily removed after the metalhas become hardened, leaving one end of the bushing section exposed insuch a manner that it may be conveniently grasped and withdrawn.

r'inother object of the invention is to provide a mold adapted to mold abushing section having pockets of such contour as to retain lubricant.packed within the pockets.

The invention also has as its object to so construct the mold that itsseveral sections may be readily disassembled so as to expose allportions of the interior of the mold.

In the accompanying drawings: Figure l is a group perspective viewillustrating the sections of the mold in position to be assembled. Fig.9. is a vertical longitudinal sectional view through the mold with theparts assembled and before the introduction of the molten metal. Fig. 3is a vertical transverse sectional view on the line 3-3 of Fig. 2, andillustrating the mold filled. Fig. 4 is a perspective view of one of thebushing sections produced by the use of the mold.

In the drawings there is illustrated but a single one of the moldsembodying the pres ent invention but this showing is merely illustrativeand in practice the molds will be arranged in gangs so that a number ofbushing sections may be produced in one operation.

The mold consists in part of a section 1 which constitutes the bodysection and which is provided with an opening 2 in which is fitted afixed core section 3. The core section 3 is provided with a tapered bore4 and in this bore is removably fitted a core 5 which is tapered fromend to end and of a length considerably greater than the lengthSpecification of Letters Patent.

Fate-rated Jan. 5, 1915.

Serial No. 789,360.

of the core section 3. The core section 3 preferably projects at bothends beyond the opposite faces of the section 1 of the mold and theminor end of the bore 4 is located at that end of the core whichprojects beyond the forward face of the section 1. That portion of thecore section 3 which fits within the opening 2 is exteriorly cylindricaland that end of the section which projects beyond the forward face ofthe section 1 is also cylindrical for a short distance in advance of thesaid face as indicated at 6. Beyond its portion 6 the said projectingend of the core section is gradually tapered as, at 7 and then sharplytapered as at 8, to its extremity. The tapered portions 7 and 8 of thesaid projecting end of the core section 3 are formed at intervals withrecesses 9, the walls of which converge in the direction of thecylindrical portion 6 of the said end of the section and the formationof these recesses results in a number of fingers 10, aswill be apparentfrom an inspection of Figs. 1 and 3 of the drawings. The sides of thefingers 10, or, in other words, the walls of the recesses 9, extendsubstantially radially to the axis of the core section except that asstated, they diverge toward the extremity of the said section. As beforestated, the core 5 is removably fitted within the bore of the coresection 3 and its minor end projects beyond the above-described end ofthe said core section 3. It will be apparent, therefore, that the inneror concave sides of the fingers 1O snugly fit the surface of the core 5so that pockets 11 are formed between the fingers, which pocketsdecrease in width in the direction of their inner ends and are alsowidened in an upward direction due to the fact that the walls of therecesses 9 are substantially radial to the axis of the core section 3.It will also be apparent that in view of the fact that the projectingend of the core section 3 is tapered toward its extremity the pockets 11are decreased in depth toward the extremity of the said projectingportion. The mold also includes an intermediate section 12 and a capsection 13 and in order that these sections may be properly assembledwith and centered with respect to the section 1, the forward face of thesection 1 is provided with forwardly projecting pins 14 located atopposite sides of the core 5 and the sections 12 and 13 are formedrespectively with openings 15 and 16 through which the pins 14 projectwhen the sections are assembled. The section 12 is formed between theopenings with an opening 17, the wall of which is cylindrical and of adiameter equal to the diameter of the cylindrical portion 6 of theprojecting end of the core section 3 and when the section 12 is fittedupon the pins 1 1 the wall of the opening 17 at that end of the openingwhich is presented at the face of the section abutting against theforward face of the section 1, snugly fits the said cylindrical portion6 in the manner clearly shown in Fig. 2. That face of the section 18 ofthe mold which contacts with the forward face of the section 12 isformed with an opening 18 designed to snugly fit the projecting forwardend of the core 5 in the manner shown in the said figure and with anannular recess 19 which surrounds the inner end of the opening and is ofthe same diameter as and matches the other end of the opening 17.

The contacting faces of the sections 12 and 13 are formed with recesses20 which open at the upper sides of the said sections and which registerwhen the sections are assembled so as to form a hopper-like inletopening through which the molten metal may be introduced into the mold.

From the foregoing description of the .invention it will be apparentthat metal poured into the mold will be formed into a bushing sectionsuch as illustrated in Fig. t of the drawings.

The bushing section, briefly stated, consists of a body portion aexteriorly cylindrical and having projecting spaced portions 1), theopposite sides of each converging toward the ends of the portions, andwebs 0 which extend between the inner ends of the said portions. It willbe apparent, particularly by reference to Fig. 3, that pockets areformed between the portions 5, which pockets are contracted at the innersurface of the bushing section.

In completing the bushing, of which a pair of the sections constitutethe body, one of the sections is fitted in one end of the hub of thewheel in which the bushing is to be arranged and the wheel with thesection arranged within its hub is then disposed upon a suitable supporthaving an upstanding core which projects up through the hub and snuglyfits the opening in the bushing section. A suitable lubricating paste isthen introduced into the hub until the hub and the pockets in thesection are filled, after which the other section of the bushing isforced into the other end of the hub thereby compressing and compactingthe mass of lubricant. The core and wheel are then removed from thetable and baked until the lubricant becomes extremely hard, after whichand finally the core is removed.

It is preferable in the use of the mold be fitted Within a suitablelength of tubing which in turn may be inserted into the hub. It willalso be apparent that if desired the bushing section may be molded witha greater number of spaced portions with corresponding increase in thenumber of pockets.

Having described my invention, claim is:

1. In a mold, a body section, a core section projecting from one facethereof and eXteriorly tapered and provided with spaced recesses, anintermediate section assembled with the body section and having anopening of greater diameter than the tapered end of the core section andreceiving the same, a cap section assembled with the said intermediatesection, and a core fitted through the said core section and through thesaid sections.

2. In a mold, a body section, a core section projecting from one facethereof, the said core section adjacent the face of said body sectionbeing substantially cylindrical and beyond its cylindrical portion beingtapered to its end, an intermediate section assembled with the bodysection and having an opening receiving said-core section, the wall ofthe opening at one end thereof fitting the substantially cylindricalportion of the core section and the opening being of greater diameterthan the tapered end of the core section, and a cap section assembledwith the said intermediate section.

8. In a mold, a body section, a core section projecting from one facethereof and exteriorly tapered and formed with spaced recesses in itstapered portion, an intermediate section assembled with the body sectionand having an opening receiving the said core section, a cap sectionassembled with the intermediate section and having an opening andprovided in oneface with a recess surrounding the opening andregistering with the opening in the contacting face of the intermediatesection, and a core fitted through said core section and projectingthrough the opening in the intermediate section and fitting the openingin the cap section.

In testimony whereof I affix my signature in presence of two witnesses.

FRANCIS B. TORREY. [1 s] Witnesses:

Gno. W. HUNT, JOHN R. KNOWLTON.

what I Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, I). G.

